Waldo c



(No ModelQ) W. C. BRYANT.

SOCKET FOR ELECTRIC LAMPS.

No. 509,'2 97.- Patented Nov. 21, 1 893,

INVENTOR (MM M A ATTORNEYJT /%ZNESSES:

UNITED STATES WALDO C.

PATENT OFFICE.

PLACE.

SOCKET FOR ELECTRIC LAMPS.

SPECIFICATION forming part of Letters Patent No. 509,297,

dated November 21, 1893.

Application filed March 22, 1893. Serial No. 467,116. (No model.)

To all whom it may concern:

Be it known that I, WALDO O. BRYAN'na citizen of the United States, and a resident of Bridgeport, Fairfield county, State of Connecticut, have invented an Improved Socket for Electric Lamps, of which the following is a specification.

My invention relates more particularly to that class of lamp sockets which is designed for use in connection with incandescent electric lamps having screw-threaded bases, the threaded portion being a metallic ring forming one of the contact terminals. In sockets as usually constructed for these lamps, the terminal with which this metallic screw ring on the lamp base is to make contact, is made of a corresponding screw-threaded ring of brass or similar metal.

One of the main objects of the present invention is to economize the construction of the socket by dispensing with the necessity of making this screw ring in the socket.

In the accompanying drawings Figure 1 is a view of a key socket partly in section, constructed in accordance with my invention. Fig. 2 is a view of the mouth of the socket. Fig. 3 is a section on the line 3-3, Fig. 1. Fig. 4is a view of a keyless socket, partly in section, and showing a lamp base in position therein.

A is the base of the socket which may be of any suitable or convenient construction, and it a key or switch mechanism be nsed,it may also be of any suitable or convenient construction.

Within the body of the socket inclosed by the metallic shell B is a diaphragm D of suitable insulating material, and to this diaphragm are secured the two metallic terminals to make contact with the two terminals at the base of the lamp. That one of the socket terminals which is to make contact with the terminal on the tip of the lamp base is preferably formed of a spring, as shown at S in Figs. 2, 3 and 4. I form the other contact of a number of spring fingers, which may be conveniently produced by forming from sheet metal a cup-like ring F with spring fin- ASSIGNOR TO THE gersf. This ring is however not a complete ring but is left open at one side for the insertion or passage of the contact S. Such a contact ring is not as expensive to produce as a threaded screw ring.

At the mouth of the socket and above or beyond the contact fingers F f, I provide a ring R of hard rubber or other suitable insuthe mouth of the shell of the socket, beyond the contacts, is adapted to receive directly and to be the immediate means of holding or-.retaining the lamp.

I claim'as my invention 1. A socket for incandescent lamps with screw-threaded bases, said socket having contacts and an insulating ring at the mouth of the socket beyond saidcontact-s and threaded for the direct reception .and holding of the threaded base of the lamp.

2. A socket for incandescent electriclamps with screw-threaded bases, said socket having a contact forthe terminal at the tip of the lamp base, with spring contacts for the metallic screw ring on the lamp base, and an insulating ring at the mouth of the socket beyond said contacts and threaded for the direct reception and holding of the threaded base of the lamp.

3. A socket for incandescent lamps with screw threaded bases, said socket having a metallic shell and contacts and an insulating ring fixedly secured in the mouth of the shell and threaded for the direct reception'of the threaded base of the lamp.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses. 1

WALDO C. BRYANT. Witnesses:

HENRY D. WILLIAMS, HUBERT HOWSON. 

